EP2696206B1 - Mittel- oder Hochspannungsanordnung mit Kabelverbindungsendgerät - Google Patents

Mittel- oder Hochspannungsanordnung mit Kabelverbindungsendgerät Download PDF

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Publication number
EP2696206B1
EP2696206B1 EP12005696.5A EP12005696A EP2696206B1 EP 2696206 B1 EP2696206 B1 EP 2696206B1 EP 12005696 A EP12005696 A EP 12005696A EP 2696206 B1 EP2696206 B1 EP 2696206B1
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EP
European Patent Office
Prior art keywords
high voltage
voltage electrode
resistor
electrode
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12005696.5A
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English (en)
French (fr)
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EP2696206A1 (de
Inventor
Jaromir Podzemny
Radek Javora
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
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ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP12005696.5A priority Critical patent/EP2696206B1/de
Priority to CN201380042143.2A priority patent/CN104641243B/zh
Priority to PCT/EP2013/002278 priority patent/WO2014023402A1/en
Publication of EP2696206A1 publication Critical patent/EP2696206A1/de
Priority to US14/616,163 priority patent/US9689898B2/en
Application granted granted Critical
Publication of EP2696206B1 publication Critical patent/EP2696206B1/de
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/04—Voltage dividers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure

Definitions

  • the invention relates to a medium or high voltage arrangement with cable connection terminal and voltage sensor, wherein the voltage sensor has a resistive voltage divider and shielding electrodes.
  • Such devices which operates at medium or at high voltage levels, may be exposed to a strong electric field which, being placed at very close vicinity, may influence measured quantities mainly in case of low-power outputs or introduce high dielectric stress on insulating material or on surface of such an equipment. Further influences could be observed, in case of outdoor installations, during raining or humid conditions, which may change electric field distribution thus causing error to measured voltage level or causing corona on the surface of devices or increased partial discharge level within devices.
  • EFU electrical functional unit
  • FCE Field control elements
  • DE 19508582A1 describes a voltage transformer with a voltage divider for measuring the voltage in medium and high voltage installations has ohmic divider resistance combined with means for compensating electromagnetic influences from the environment.
  • the divider resistance is made in a single piece with a measurement resistance and is provided with taps.
  • the divider resistance consists of a metallic material vaporised on a substrate or is manufactured by thick film technology. At least one tap is connected to at least one, in particular capacitive, compensation means.
  • FR 2506947A1 describes a device for measuring high alternating voltages in high-voltage switching installations, particularly in metal-encapsulated SF6-gas-insulated high-voltage switching installations, has at least two ohmic resistors arranged in series between the high-voltage potential and earth and forming an ohmic voltage divider, of which the resistor connected to earth is used as measuring resistor.
  • the resistor at the high-voltage end and the measuring resistor are formed of in each case at least one resistance element which consists of an insulating body and resistance material applied thereto.
  • the insulating body is constructed to be tubular and covered on its outside with the resistance material, which is a thick-film paste applied to the insulating body in the form of resistance tracks.
  • the transient voltage distribution is controlled by a single, cap-shaped control electrode.
  • EP 0678956A1 describes that a combined current and voltage sensor for a high voltage switchgear panel has a housing made from age-hardening castable material. At one end, the housing has a cavity, in the bottom of which is a contact element. The cavity has a lid made from insulating material. Between the lid and the contact element is an elongated high ohmage resistor, used as a voltage sensor. The contact element is connected to a conductor embedded in the housing and at the other end of the conductor is a circuit breaker. A Rogowski coil around this conductor acts as the current sensor.
  • EP 0510427A2 describes that the voltage transformer which can be used in a medium- or high-voltage system exhibits an ohmic voltage divider, which is of rotationally symmetric shape, as voltage sensor.
  • This voltage sensor can be brought into contact with a voltage-conducting part and with a part which is at earth potential of the system.
  • the voltage transformer is intended to be distinguished by high measuring accuracy even under the most varied operating conditions of the system containing it. This is achieved by the fact that the voltage sensor constructed as voltage divider, after being installed in the system, is arranged in a space which is largely shielded against electrical fields.
  • a voltage divider consists of an insulating body, which is housing high voltage impedance being connected to high voltage at one end and to low voltage impedance at the other end. Low-voltage impedance needs to be connected to the ground. Output of such impedance divider is done by means of two wires and or cable.
  • a general impedance divider has insulating body accommodating impedance which is connected at one end to high voltage and at the other end to low-voltage impedance. Both high-voltage impedance and low-voltage impedance form a voltage divider with given division ratio. Voltage divider is grounded through ground connection. Output wires go through the cable which is shielded in order to minimize effects of external field on low-voltage signal going through the output wires. In order to reduce capacitive pick-up from external voltage sources or fields, shielding electrodes are used around divider.
  • shielding electrodes improve electric field distribution on surface of the insulating body or within that insulating body, thus enables higher dielectric withstand of the device.
  • shielding electrodes minimizes sensitivity of the voltage divider towards external connections to high-voltage or to other surrounding devices connected to high potential.
  • the voltage sensor is applied as a voltage sensor module, which is integrated in a further cable connection terminal, and that the shielding electrodes are integral part of the voltage sensor module or integral part of an insulating housing part of the terminal. By that, the voltage measurement can take place with higher accuracy.
  • the shielding electrodes are applied at the low voltage and high voltage side of a resistive voltage divider with different conical shape in that way, that the opening diameter of the shielding electrode at the low voltage side is greater than the opening diameter of the shielding electrode at the high voltage side.
  • the further cable connection terminal housing has an opening with a conical shape at least at the inner surface in that way, that the cone diameter increases from inside towards outside, and that at least the inner surface of the cone is covered with a conductive or semiconductive layer, and that the resistive voltage sensor divider is located in that way, that the high-voltage side is placed at the side with smaller inner diameter of the terminal opening, and in an unclaimed embodiment useful for understanding the invention, the high voltage side is placed at the bigger diameter of the terminal housing opening.
  • a conductive layer as a kind of integral shielding electrode.
  • Such electrode layer can also be located inside of the terminal housing or on its outer perimeter.
  • the further cable connection terminal is applied adjacently to the cable terminal of the operating cable connection of the switchgear or other high or medium voltage arrangement, at the outgoing section side of for example a the pole part.
  • a further advantageous embodiment is, that the voltage sensor module is electrically connected to the further cable connection terminal.
  • a further advantageous embodiment is, that the voltage sensor is applied as a voltage sensor module, which is integrated in the a further cable connection terminal, and that the shielding electrodes are integral part of the voltage sensor module or integral part of an insulating housing part of the terminal, that instead of a resistive voltage divider only low- and high-voltage electrodes are applied for voltage sensing purpose.
  • a further advantageous embodiment is, that the high-voltage shielding electrode and the low voltage shielding electrode are arranged in relation to each other in such, that they at least partly overlap. This gives further enhancement of accuracy in voltage measurement.
  • FIG. 1 An advantageous embodiment of the invention is shown in figure 1 and an unclaimed example useful for understanding the invention is shown in figure 2 .
  • the proposed example suggest the use of shielding electrodes where upper shielding electrode 10 has a conical shape which increases distance from resistive divider 3 along his axis. This is in line with decrease of electric potential inside of the resistive divider. Due to such electrode 10 design, constant electric stress of insulating material between electrode 10 and resistor 3 is achieved. Lower shielding electrode 11 is also having conical shape, but is located in opposite direction from the upper electrode 10.
  • resistive divider In case the application of resistive divider is not as stand-alone device but integrated into other parts of the system, e.g. cable terminal, it is better to have lower shielding electrode 11, connected to the ground potential, bigger then the upper electrode 10 connected to the high voltage potential. Such configuration is shown in Fig. 1 , with high-voltage terminal 20.
  • Minimum phase error could be achieved by putting the smaller electrode at least partly inside of the bigger one, with keeping sufficient distance B in between them.
  • a further embodiment could be, that no resistive voltage divider is used. But the voltage measuring means consist of shielding electrodes without resistive voltage divider, so that the voltage measuring means only is based on the shielding electrodes thus forming a kind of capacitive divider.
  • shielding electrodes in both cases capacitive measurement and resistive measurement can be obsolete, as separate shielding elements, if the inner surface of the terminal opening of the insulating body will be covered in the inner surface with a conductive material.
  • a further advantageous embodiment is, that the voltage sensor is applied as a voltage sensor module, which is integrated in the further cable connection terminal, and that the shielding electrodes are integral part of the voltage sensor module or integral part of an insulating housing part of the terminal, and the shielding electrodes are used for voltage indication of for voltage detection purposes, whereas voltage sensor module is used for voltage measurement purposes.
  • the high-voltage shielding electrode and the low voltage shielding electrode are arranged in relation to each other in such, that they, from external point of view at least partly overlap.
  • a further refinement is, that the end of each electrode is rounded with minimum radius of 0,1 mm.
  • the electrode is made at least partly out of conductive material, capable of distributing electric potential.
  • a last important refinement is, that the minimum phase error is achieved when division ration of capacitive resistances, created by shielding electrodes, match division ratio of the resistors R1 and R2 of the resistive divider.
  • Fig. 3 describes the effect of shielding electrode on electrical parameters and output signal of impedance divider.
  • the resistors R1 and R2 in case of resistive divider, are selected in a way to get required division (transformation) ratio. Any capacitance introduced to the circuit cause phase error (displacement) of the output signal comparing to the measured (input) signal.
  • Ce capacitance is mainly affected by shape and position of the shielding electrodes (if used).
  • Ccable capacitance is mainly caused by cable 8 capacitance. In case the division ratio of reactances caused by capacitances Ce and Ccable match division ratio of the resistors R1 and R2, minimum phase error is achieved.

Claims (4)

  1. Mittel- oder Hochspannungsanlage, Folgendes umfassend:
    - eine Kabelanschlussklemme;
    - einen Spannungssensor;
    - eine Hochspannungsklemme (20); und
    - eine Erdpotentialklemme;
    wobei der Spannungssensor in die Kabelanschlussklemme integriert ist;
    wobei der Spannungssensor einen Widerstandsspannungsteiler (3, 5), eine Niederspannungs-Abschirmelektrode (11) und eine Hochspannungs-Abschirmelektrode (10) umfasst, wobei die Hochspannungselektrode aus einem leitenden Material und die Niederspannungselektrode aus einem leitenden Material besteht;
    wobei der Widerstandsspannungsteiler einen ersten Widerstand (3) und einen zweiten Widerstand (5) umfasst, wobei der erste Widerstand ein erstes Ende und ein dem ersten Ende gegenüberliegendes zweites Ende aufweist, und der zweite Widerstand ein erstes Ende und ein dem ersten Ende gegenüberliegendes zweites Ende aufweist;
    wobei das zweite Ende des ersten Widerstands elektrisch mit dem ersten Ende des zweiten Widerstands verbunden ist, und der erste Widerstand und der zweite Widerstand entlang einer Achse des Widerstandsspannungsteilers angeordnet sind;
    wobei das erste Ende des ersten Widerstands elektrisch mit der Hochspannungsklemme verbunden ist;
    wobei das zweite Ende des zweiten Widerstands elektrisch mit der Erdpotentialklemme verbunden ist;
    wobei die Hochspannungselektrode eine konische Form hat, wobei die Hochspannungselektrode direkt elektrisch mit der Hochspannungsklemme verbunden ist, und wobei sich nur ein Teil des ersten Widerstands innerhalb der konischen Form der Hochspannungselektrode befindet;
    wobei die Öffnung der konischen Form der Hochspannungselektrode von der Hochspannungsklemme weg weist, und wobei die konische Form der Hochspannungselektrode einen maximalen Durchmesser an der Öffnung hat, die einen kreisförmigen Querschnitt aufweist;
    wobei eine zentrale Achse, die sich durch die Mitte der Öffnung der konischen Form der Hochspannungselektrode erstreckt, koaxial mit der Achse des Widerstandsspannungsteilers ist;
    wobei die Niederspannungselektrode eine konische Form hat, wobei die Niederspannungselektrode direkt elektrisch mit der Erdpotentialklemme verbunden ist, und wobei sich der zweite Widerstand innerhalb der konischen Form der Niederspannungselektrode befindet;
    wobei die Öffnung der konischen Form der Niederspannungselektrode von der Erdpotentialklemme weg weist, und wobei die konische Form der Niederspannungselektrode einen maximalen Durchmesser an der Öffnung hat, die einen kreisförmigen Querschnitt aufweist;
    wobei eine zentrale Achse, die sich durch die Mitte der Öffnung der konischen Form der Niederspannungselektrode erstreckt, koaxial mit der Achse des Widerstandsspannungsteilers ist;
    wobei die Hochspannungselektrode von der Niederspannungselektrode beabstandet ist; und
    wobei der maximale Durchmesser der Öffnung der konischen Form der Hochspannungselektrode kleiner ist als der maximale Durchmesser der Öffnung der konischen Form der Niederspannungselektrode.
  2. Mittel- oder Hochspannungsanlage nach Anspruch 1, wobei sich ein Teil der Hochspannungselektrode innerhalb der Niederspannungselektrode befindet.
  3. Mittel- oder Hochspannungsanlage nach einem der Ansprüche 1 bis 2, wobei das Ende der Hochspannungselektrode an der Öffnung und das Ende der Niederspannungselektrode an der Öffnung mit einem Mindestradius von 0,1 mm abgerundet ist.
  4. Mittel- oder Hochspannungsanlage nach einem der Ansprüche 1-3, wobei das Verhältnis der kapazitiven Reaktanz der Hochspannungselektrode zu der Niederspannungselektrode gleich dem Verhältnis des Widerstands des ersten Widerstands zu dem zweiten Widerstand ist.
EP12005696.5A 2012-08-06 2012-08-06 Mittel- oder Hochspannungsanordnung mit Kabelverbindungsendgerät Active EP2696206B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12005696.5A EP2696206B1 (de) 2012-08-06 2012-08-06 Mittel- oder Hochspannungsanordnung mit Kabelverbindungsendgerät
CN201380042143.2A CN104641243B (zh) 2012-08-06 2013-07-31 具有电缆连接端子的中压或高压装置
PCT/EP2013/002278 WO2014023402A1 (en) 2012-08-06 2013-07-31 Medium or high voltage arrangement with cable connection terminal
US14/616,163 US9689898B2 (en) 2012-08-06 2015-02-06 Medium or high voltage arrangement with cable connection terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12005696.5A EP2696206B1 (de) 2012-08-06 2012-08-06 Mittel- oder Hochspannungsanordnung mit Kabelverbindungsendgerät

Publications (2)

Publication Number Publication Date
EP2696206A1 EP2696206A1 (de) 2014-02-12
EP2696206B1 true EP2696206B1 (de) 2023-11-01

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US (1) US9689898B2 (de)
EP (1) EP2696206B1 (de)
CN (1) CN104641243B (de)
WO (1) WO2014023402A1 (de)

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DE102014203447A1 (de) * 2014-02-26 2015-08-27 Kries Energietechnik Gmbh & Co. Kg Messsonde zur Hochspannungsmessung und Hochspannungsmessanordnung
CN104297552B (zh) * 2014-09-28 2017-07-28 易能乾元（北京）电力科技有限公司 一种中压光学电压互感器
EP3002594B1 (de) 2014-09-30 2019-06-05 3M Innovative Properties Company Spannungsmessvorrichtung
US10129973B2 (en) 2016-06-17 2018-11-13 General Electric Company Voltage divider circuit assembly and method
EP3364196A1 (de) * 2017-02-20 2018-08-22 Arteche Centro de Tecnologia, A.I.E. Hochspannungs-messsteckvorrichtung
CA3063358A1 (en) * 2017-05-17 2018-11-22 3M Innovative Properties Company Sensors with discrete capacitors for high voltage separable connectors
CN107768871A (zh) * 2017-11-06 2018-03-06 江苏科兴电器有限公司 一种具有电压传感器功能的电缆中间连接头
EP3575804A1 (de) 2018-05-30 2019-12-04 3M Innovative Properties Company Spannungssensor
EP3578998A1 (de) 2018-06-08 2019-12-11 3M Innovative Properties Company Impedanzanordnung
CN109100545B (zh) * 2018-09-29 2023-09-26 广东米勒电气有限公司 一种侧扩封堵式电压传感器及使用方法
CN109239439A (zh) * 2018-10-16 2019-01-18 国网江苏省电力有限公司南京供电分公司 一种嵌入式电压传感器
EP3699602A1 (de) 2019-02-22 2020-08-26 ABB Schweiz AG Spannungssensor für mittelspannungs- oder hochspannungsmessungen

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Also Published As

Publication number Publication date
EP2696206A1 (de) 2014-02-12
US20150153391A1 (en) 2015-06-04
WO2014023402A1 (en) 2014-02-13
CN104641243B (zh) 2017-11-17
CN104641243A (zh) 2015-05-20
US9689898B2 (en) 2017-06-27

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